Carburetor



J. MGCLELLAND' CARBURETOR Filed oct. 2, 1919' Wnesses: lamentar JO/zrzo'lellazd A i?? Patented Apr. 13, 1926.

UNITED STATES 1,580,834 PATENT oFF'l-CE.

JOHN MCCLELLAND, F PHILADELPHIA, PENNSYLVANIA, ASSIG-NOR 0F ONE-HALF T0 MICHAEL J'. HUNT AND ONEfHALF TO I. CLIFFORD VAIDEN, BOTH 0F PHILA- DELPHIA, PENNSYLVANIA. I

CARBURETOR.

Application led October 2, 1919. Serial No. 327,956.

To all whom, it may concern.'

Be it known that I, JOHN MCCLELLAND,

a citizen of the United States, residing at Philadelphia, in the county of PhiladelphiaJ and State of Pennsylvania, have invented certain new and useful Improvements in Carburetors, of which the following is a specification.

One object of my invention is to provide an improved carburetor which will thoroughly mix air with fuel, such for example as "gasoline, prior to the entrance of the mixture to the cylinders of an internal combustion engine.

Another object of my invention is to provide improved means which will automatically operate to cause the admission of air into a carburetor so as to provide for the proper mixture of the air with the fuel.

A still further object is to make my invent-ion of a simple and durable construction and so that it can be easily andquickly manipulated. v

These objects, and otherl advantageous ends which will be described hereinafter, I attain in thc following manner, reference being had to the accompanying drawings in which- Figure 1 is an elevation of my improved carburetor showing certain of the parts in vertical central section,

Figure 2 is a transverse section taken on the line 2 2 of Figure 1, and

Fi ure 3 is a fragmentary section taken on the line 3 3 of Figure showing my improved mixing fan.

Referring to thedrawings, 4 represents the body portion of my improved carburetor which, in the present instance, is made in three sections, 5, 6 and 7. The section 6 is made hollow and is provided with two air chambers 8 and 9; there being a space 10 provided between two extensions 11 and 12 of the body section 6. y 45 A mixing fan 13 has hollow blades 14 which extend atan angle and this fan is positioned within the space 15 of the section 7 space 15 serving as a mixing chamber. The interiors of the bladesv 14 communicate with a hollow head 16 and said blades extend from said hollow'head, as clearly shown in Figure 2. Each of the bladesadjacent its top edge is provided with a plurality of perforations 17. A hollow spindle tube 18 is rotatably mounted in a ball bearing 19; said ball bearing being preferably removable by screw threading the same as shown in Figure 1. The spindle tube 18 has a contracted neck 20 into which projects the upper open end 21 of a nozzle .22; said nozzle extending upwardly from the section 5 and adapted to receive gasoline or other fuel which may be fed thereto by a pipel23 from a fuel supply chamber which is open to atmospheric pressure. The interior of the .spindle or tube'18 is larger than the nozzle 22 so that air from the chamber 9 can pass upwardly through the tube 18.

The extension 11 has an opening 24 and the extension 12 has an opening 25, both of said openings communicating with the atmosphere. A rod l26 slidably extends through the extension 11 and through the opening 25 into the chamber- 9. Valves 27 and 28 are secured to the rodl 26 for the purpose of normally closing the respective openings 24 and 25. A spring 30 is interposed between t-he top of the extension 11 and a nut 31 which is preferably screwed on Y the upper end of the rod 26. Thus the spring 30 normally holds the valves 27 and 28 in positions respectively closing the openings 24 and 25.

The section 7 is adapted to be connected to the intake manifold of an internal `combustion engine and the operation of the engine causes a suction to be produced in the chamber 15 due to the action of the engine in the usual manner. This suction causes fan 13 to rotate and valves 27 and 28v to open and admit air to chambers 8 and 9. The air admitted to chamber 8 goes between the blades of the fan to the mixing chamber. The air admitted to chamber 9 goes through tube 18 to the contracted neck 20 where it mingles with the gasoline coming from nozzle 21 and passes as a rich vapor into the fan which distributed the vapor in the mixing chamber. To secure the best results a materially larger quantity of air should be fed to the mixing chamber through chamber 8 than can profitably be fed from chamber 9 through spindle 18 and the quantities fed through each path Should at all times be properly proportioned. If a greater or less quantity ofairis drawn in through chamber 8', the quantity drawn in through chamber 9 should be increased or decreased in the same ratio. For this reason opening 24 is made larger than opening 25 and valves 27 and 28 are connected so that,

when the suction increases or decreases the valves will open or close in like degree.

By providing a comparatively narrow neck the fuel and the air in the tube' 18 will mix to a certain extent prior to passing out through the perforations 17. By causlo ing this latter mentioned air and fuel to pass outwardly through the comparatively small perfor-ations 17 and by the rot-ation of tlie fan within the space l5, the fuel and the air will be thoroughly mixed and will be in condition to provide a powerful explosion when admitted into the cylinders of the engine. lt will thus be noted that the fan and its connected parts perform a number of operations. First it causes the mixture of the fuel 2o coming through the nozzle with the air coming through the tube. Second it causes the air and fuel mixture to pass out of comparatively small perfor-ations and thereby distribute various quantities of mixed fuel 25 and air to be agitated by the rotation of the fan. 1By this means l secure a. practically perfect mixture of the fuel and air in a condition which is readily explosive so as to provide great power.

By having the two valves 27 and 28, air can be independently supplied to the chambers 8 and 9 and since a vacuum or partial vacuum is established due to the suction of the engine, the air will be drawn separately 3e through the passages 24; and 25 so that the rotation of the fan will not interfere with the suction of-the fuel and air upwardly through the perforations in the fan blades.

Thus, by the provision of the valves 27 and le 28 the chambers 8 and 9 are independently supplied with air and when the device ceases acting, the valves will automatically operate to close the respective passages and prevent evaporation of the fuel and the entrance of dirt into the chambers.

While l have described my invention as 'taking a particular form, it will be understood that the various parts of my invention may be changed without departing from the spiritthereor, and hence l do noic mit myself to the precise construction set crth, but consider that l am at lliberty to make such changes and alterations as fairly come within the scope of the appended claims.

Having thus described my invention, what l claim as new and desire to secure by Letters Pat-ent is l. A carburetor including a hollow body forming a mixing chamber; a. fan, mounted in the mixing chamber, having hollow blades provided with outlet openings; a rotatably mounted spindle carrying the fan and having a passage therethrough open at the lower end to receive air and communi- @5 eating at the other end with the interior of lili ,end to receive air and communicating at the other end with the interior of the fan: a fuel nozzle extending into the open end of the spindle; an air intake for admission of air to the spindle; an air intake for admitting air to the mixing chamber, and means for controlling admission of air to the spindle and the mixing chamber.

3. il carburetor including a hollow body -forming a mixing chamber; a fan, mounted in the mixing chamber, having hollow blades provided with outlet openings; a rotatably mounted spindle carrying the fau and having a passage therethrough openl at the lower end to receive air and communieating at the other end with the interior of tue fan; a fuel nozzle extending into the open end of 'the spindle; an air intake for admission of air to the spindle; an air intake for admitting air to the mixing chamber, and common means for controlling admission of air to the spindle and the mixing chamber.-

4. A carburetor including a hollow body forming a mixing chamber; a fan, mounted in the mixing chamber; having hollow blades provided with outlet openings; a rotatably mounted spindle carrying the fan and having a passage therethrough open at the lower end to receive air and communieating at thc other end with the interior of the fan; a fuel nozzle extendin into the open end of the spindle; an air mtake for admission of air to the spindle; an air intake for admitting air to the mixing chamber, the opening of the latter intake being the larger, and means for controlling admission of air to the spindle and the mixing chamber.

5. A'carburetor including a hollow body forming a mixing chamber; a fan, mounted in the mixing chamberj having hollow blades provided with outlet openings; a rotatably mounted spindle carrying the fan and having a passage therethrough open at the lower end to receive air and communieating at the other end with the interior of the fan; a fuel nozzle extending into the open end of 'the spindle; an air intake for admission of air to the spindle; an air intake for admitting air to the mixing chamber; a valve for controlling the admission of air through each intake, and a connection between the valves whereby they open and close concurrently.

6. A. carburetor includinga hollow body ill() lll@ forming a mixing chamber; a fan, mounted in the mixing chamber, having hollow blades provided with outlet openings; a ro-` tatably mounted spindle carrying the fan and having a passage therethrough open at the lower end to receive air and communieating at the other end withthe interior of the fan; a fuel'nozzle extending into the open end of the spindle; an air intake for admission of'air to the spindle; an air intake for admitting air to the mixing chamber; a valve for controlling the admission of air through each-intake; a connection between the valves vwhereloy they open and close concurrently, and a spring normally holding the valves closed but permitting them to be opened by the .suction due to opration ofthe engineand to move from or toward their closing position as the suction increases or decreases.

In testimony whereof ,I have signed myl name to this specilication.

JOHN MCCLELLAND. 

